William herbert john stacy



Auz- 25. 1925.

W. H. STACY SCREW DOWN STOP VALVE Filed Dec. 2, 1924 y fw Patented Aug.25, Y1925.Y

UNITED sr'ArEs WILLIAM HERBERT JoIHN sTAoY, or LINLFIELD, NEAR SYDNEY,NEW sourir WALES,

AUSTRALIA. 1 v

'ASCREV-DOWN STOP VALVE.

Application led December 2, 1924. Serial No. 753,508.

To all whom it' may concern:

Be it known that l, "VVILLJAM HERBERT JOHN STAGE?, a subject oi the Kingor' Great Britain and lreland, and resident of Limpley Stoke, NorthcoteRoad, Lindield, near Sydney, in the State or' New South YVales,

Commonwealth of Australia, have invented certain new and usefulinprovements in Screw-Down Stop Valves (for which I have filedapplications in Australia, Nos. 17,961

on the 27th- May, A. D. 1924;, andlll on the 23rd June, A. l). 1924), ofwhich the fol*- lowing is a specification. l

This invention relates to stop valves of the type in which the spindle,on the inner end of which is the valve, is screw-threaded and engages acomplementary screw thread in the body or in an attachment thereon, sothat as the spindle is rotated the valveis moved towards or from itsseat to close orr open it according to the direction of rota tion of thespindle. More particularly the invention relates to valves 'of thistype'in which the valve seat is located at the inner' end ol" a longnarrow bore, said bore being screw-threadedV for part of its length torefl ceive the threaded valve spindle.

ln this type of valve the actual valve wnich bears upon the seat must beattached to the end of the spindle (or is commonly integral therewith)so that it will be positively moved to or trom the seat by the inward oroutward movement respectively ot the spindle as it is rotated. 'toccasionally necessary'to regi-ind the valve and seat by placing betweenthem fine abradsing material and rotating one on the other while theyare pressed to'vvards each other, but it is obviously impossible to dothis while the valve is attached tothe spindle Vas yrota- Y tion of thelatter either forces the valve progressively towards or retracts it fromthe seat.

It is also advisable that the valveshall be attached to the spindle insuchv manner Vthat the latter may be turned independentlyof the valve.

Y The object of this invention is lto provide a novel Vconstruction ofparts and means wherehythe valve ,is d'etachably secured to the spindle.in such manner as to permit either to be rotated independently of theother yet ensuring that the valve shall move inwardly and outwardly ,(asthe case may be) on rotation of theA spindle, and tol provide a valvewhich is readily attachable to y isA however yanother implement used inthe regrin'ding operation. A still vfurther object of the invention istoprovide a construction whereby the valve is so securely locked to thespindle as to prevent'the 'valve fromy sticking toits seat, and preventpressure on the back of the valve from holding the latter to its Vseatand consequent separationof the valve* and spindle vwhen the latter isretracted with the object of `opening the valve.

A still further object of the invention is t0 provide an improvedcombination tool for use in the regrindingof a valve normally attachedto the spindlefin the manner aforesaid but detached therefrom for thepurposev of being reground.- Y y f y W'it-h these 'objects theinventionconsists in a stop-valve including a valve formed with a stem littingeither in or about the inner end oi" the spindle, one or said elementsbe-v ing formed withY an annular groove, anda pair oi" balls or plungerscarried by the other element and Vmoved radially inwardly or outwardlyby means of spring pressure (applied directly or indirectly) to engagesaid groove and thus'releasably holdV thev valve to the spindle, saidvalve being 'also formed for attachmentto a separate tool used in theregrinding operation.

The' invention. also consists` in means whereby the valve is positivelybut releasably loc-lied to the spindle, such means comprising a springpressed slidableelement'def signed to `force the ballsradially eitherinwardly or outwardly into Vengagement with lthe groove and to'maintainsuch engagement.

The invention further consists in av tubular substitute spindleandvalve-holding key for use in the regrinding operationf as hereinafterexplained.

In the vaccompanying drawings which depict various embodiments of myVinvention.

Fig. 1 is a sectional elevation of valve construction according to myinvention, and

Fig. 2 a'sectionalplan view von line II Il of Fig. 1.

Fig. 3 is a partsectional elevationl show-v l ing a modification of theconstruction shown in Fig. 1 and Fig. 4; is a'sectional plan on lineIVIV of Fig.'3. V

Y Fig. 5 is a partsectional elevation showing a. still furthermodification.

It is not considered necessary to depicta g1and-box 'or any othercontrivances or ata,

tachments on the valve body as same have no relation to this invention,it being understood that such may be employed iic and where required.

In the drawings the same reference numerals indicate corresponding partsin all the gures.

The valve body 1 is formed with a valve seat 2, with inlet and outletpassages 3 and 4 respectively and a long bore 5 which is screwthreadedfor part of its length as at 6 to receive the screw-threaded spindle 7which carries on its inner end the valve 8l.

Referring to the construction shown in Figs. 1 and 2; the valve 8 isformed with a hollow stem 9 which neatly lits about the rcduced innerend of the spindle 7 which is formed with a bore 10. In the spindle wallabout said bore are two radial holes in which are housed balls 12 whichengage with an annular groove 11 formed on the valve stein 9. lTheseballs are radially pressed outwardly into engagement with the groove 11,and releasably maintained in that position, by means o ataper-endedplunger 14 slidable in the bore 10 of the spindle and backed by a spring15. The balls 12 are of such size als to neatly lit between the lowerend of plunger 14 (when in operative position as shown) and the wall ofthe groove 11 on the valve stem, so that the valve is positively lockedto the spindle.

Fixed in the plunger 14 and extending laterally through an elongatedaperture 16 in the wall of the spindle, is a stud 17. This stud isprovided for the purpose ot' affording convenient means whereby theplunger 14 may be moved against the pressure of the spring 15 to permitthe balls 12 to move inwardly and release the valve which may then be.drawn ott the spindle. This operation is of course performed when thespindle 7 and valve 8 are withdrawn from the body 1.

Referring to Figs. 3 and 4; the valve 8 is formed with a solid stem 9tting within a. bore 18 in the spindle 7, the groove 11 being formedcirciuniferentially on said stem and the balls 12 housed in holes in thespindle wall about said bore 1S. In this construction the looking meanscomprise a sleeve 19 slidable on the spindle 7 and a backing spring 20,the bore oft said sleeve at the end remote from the spring beingchamfered to 'facilitate its riding over the balls 12 to press sameinwardly into engagement with the groove 11 on the valve stem.

In the construction shown in Fig. 5, the stem 9 of the valve 8 is hollowas in Fig. 1 and is formed to fit about the reduced end 21 of thespindle 7, the balls 12 being housed in holes in the stem 9 and thecomplementary locking groove 11 formed on the reduced end 21 of thespindle. Locking means comprising a sleeve 19 and backing spring 2O asbefore described inreference to the construction shown in Fig. 3, areprovided.

In all constructions depicted a threaded hole 22 is formed in the valveor in its stem for the purpose of enabling the valve to be attached to akey or like implement used in the regrinding operation as immediatelyhereinafter explained.

The spindle 7 with attached valve 8 having been withdrawn from the body1, the valve is detached from the spindle and is screwed on the threadedend of a key after the latter has been inserted in the bore of a tubularsubstitute spindle in which it neatly lits so as to be rotatable andaxially movable therein. The substitute spindle is formed with athreaded portion corresponding to the thread in the bore 5 of body 1,and with a head Yformed for engagement by a suitable tool whereby it isscrewed in or out or the body. vThe substitute spindle is then insertedin the body 1, the head determining its position therein and, inconjunction with the threaded portion centering the spindle in the bore5 of body 1. The regrinding operation is then performed by rotating thekey and at the saine time pressing it inwardly to cause the valve tobear hard on the seat 2, suitable abrading material being insertedbetween the valve and seat.

IVhat I claim and desire to secure by Letters Patent is:

1. A stop-valve including in combination a body formed with a valve-seatlocated between inlet and outlet passages, a spindle screwing into saidbody, a valve having a stem formed to ht the inner end of the spindleand means for detachably holding said valve stem to the spindle, saidmeans comprising a pair oit radially movable balls housed in one oit thelast mentioned elements and spring pressed into engagement with anannular' groove formed on the other element.

2. In a stop valve, in combination, a spindle screwing into the valvebody, a detachable valve on the inner end oic said spindle, said valvehaving a formed to telescopically fit the inner end of the spindle, andmeans for releasably locking together said telescopically fitting parts,said means comprising a pair oi radially movable balls carried by oneoit' said parts, a locking element slidalole axially in relation to thespindle, and a spring pressing said locking element into operativeengagement with said balls to radially move same into and maintain themin engagement with an annular` groove on the other of saidtelescopically iitting parts.

Signed at Sydney, New South IVales, this twenty-ninth day of SeptemberA. D. 1924.

WILLIAM HERBERT JOHN S'TACY.

